Hoisting-tower.



F. DONALDSON. HOISTING TOWER. APPLIOATION FILED DEC. 3, 1912 Patented Apr. 14, 1914.

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FRANCIS DONALDSON, 0F YONKERS, NEW YORK, ASSIGNOR TO THE '1. A. GILLESPIE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

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Specification of Letters Patent.

Patented Apr. 14, 191 1.

Application filed December 3, 1912. Serial No. 734,662.

To all whom it may concern:

Be it known that I, FRANCIS DONALDSON, a citizen of the United States, residing at Yonkers, county of Westchester, State of New York, have invented certain new and useful Improvements in Hoisting-Towers, of which the following is a full, clear, and eXact description.

In erecting concrete structures by pouring and depositing concrete into molds arranged in the positions which the molded concrete is to occupy in the finished structure it is customary to deliver the concrete to the mold or molds by means of a chute or spout extending to the mold from an elevated hopper, the concrete being conveyed to the hopper from the point of mixing by means of a hoisting bucket or similar device. From time to time, as the structure grows in expanse, the chute is shifted laterally and as the structure rises the chute is raised. This necessitates raising the concrete higher before it is dumped into the chute, so that the elevating structure must either be given its maximum height when the work is begun or must be increased in height as the work progresses. In either case it is a troublesome and time consuming operation to erect a high tower or to increase the towers height by methods ordinarily used.

I have accordingly been led to devise my present invention, which has for its chief object to provide a hoisting tower whose height can be increased and diminished as occasion may require, with ease and despatch.

To this and other ends the invention consists in the novel features of construction and combination of elements hereinafter described, and more particularly pointed out in the appended claims.

One form of the invention is illustrated in the accompanying drawings, in which Figure 1 is a side view of the upper portion of the tower, in use for hoisting concrete. Fig. 2 is a section on line 2 of Fig. 1, showing the gallows orhoisting frame. Fig. 3 is a plan view. Fig. 4 is a side view of the tower with a section being raised into position to add to the height of the tower. Fig. 5 is a side view showing the tower with the additional section in position, just before the gallows frame, which carries the hoisting apparatus, is lowered to its normal position for hoisting concrete. Fig. 6 is a rear view of the tower as shown in Fig. 5, but with the gallows frame broken away.

The tower illustrated is of the skeleton type and is composed of sections, the ends of each being constructed to telescope into or over the end of the adjoining sections. The telescoped ends are of course bolted together or otherwise secured in any convenient manner. Each section consists of four corner posts or uprights 10, 11, and suitable horizontal and diagonal members 12 at the sides, front and rear. The sides of the tower are not inclined toward each other but are all parallel to the axis of the tower.

At the top of the tower is a gallows or cantaliver hoisting frame, comprising, generally, a pair of spaced uprights or vertical side members 13 and a cantaliver 1 1 extending forwardly beyond the front of the tower from between the said side members 13. At the rear the side members are connected by horizontal members 15 and in front by a like member 16; the latter, and the rear member 15 immediately behind serving to support the cantaliver 14:. The side mem bers are spaced apart far enough to fit over the rear uprights 10 of the upper towersection, aS shown in Figs. 1 and 2; and to maintain the gallows-frame uprights vertical they are provided on their inner sides at the front edge with vertical strips or guides 17 engaging the front faces of the corner posts 10.

The gallows frame is raised with respect to the tower and is prevented from sliding down on the tower, (that is to say, is held in raised position with the cantaliver at a suitable height above the topmost tower-see tion), by a tackle 18 (see Fig. 5) having a sheave block 19 removably fastened to the upper and rear horizontal member 12 of the topmost tower-section, a sheave block 20 removably connected to the lowermost horizontal member 15 of the gallows frame, and a rope 21 which may of course have its free end detachably fastened to the tower in any convenient manner, not shown. When raising a new tower section the tackle is adjusted to hold the gallows frame in a position with the cataliver elevated above the tower top a distance slightly greater than the height of a tower-section, as clearly indicated in Fig. 4. The rear end of the cantaliver is connected to the rear of the gallows frame by diagonal tension rods 22, which may be tightened as desired by turnbuckles The cantaliver itself is composed of two horizontal frames 24 arranged side by side and spaced apart by a front block 25 at the forward end and a rear block 26 behind the upper members 15. These beams are provided with rails 27, mounted a carriage 28 having grooved wheels 29 and downwardly extending hooks 30 extending under the beams 24: to prevent derailment of the carriage. On the carriage are two heaves 31, 32, over which runs a rope 33 carrying the concrete bucket 34, one end of the rope being attached to the front block 25 while the other leads to a suitable hoisting engine, not shown. hen the apparatus is used for hoisting the carriage can be anchored, if desired, in any convenient manner, not shown,

For the purpose of guiding the bucket as it rises and falls in the tower, it is provided with guide shoes 36, engaging vertical I guides 37 on the sides of the tower. At 39 is shown a portion of the hopper into which the concrete is dumped.

hen it is desired to add a section to the top of the tower the carriage 28 is released and the carriage caused to move forwardly, to the position shown in dotted lines in Fig. l, and the tackle is manipulated so as to raise the gallows frame to the position shown in Fig. 4:. This is done by pulling down on the fall-rope 2F; and since the upper sheave 19 is fastened to the tower member 12 and the lower sheave 20 is fastened to the gallows-frame member 15, pulling down the fall-rope must raise the said member 15 and hence the vertically slidable gallows-frame also. The sheave 38 is then lowered and a tower-section hooked thereon, after which the section is hoisted above the tower top. The carriage is then run back and the section suspended therefrom is seated on the one below. The seated section having been secured in place and the sheave 38 released, the tackle 18 is manipulated to raise the gallows frame to the position for hoisting another section. In this way any number of sections can be added and the tower raised to any height, limited only by the towers strength and stability. The tower can of course be taken down by reversing the operation described.

The structure herein specifically illustrated and described is merely the preferred form of the invention, which can be embodied in other forms without departure from its proper spirit and scope as defined by the appended claims. Nor is the invention limited to use for hoisting concrete,

on which is and beyond the top of the structure, and

means to raise the hoisting frame relatively to the topmost ection on which it is mounted and space the overhanging portion vertically from the top of the section on which the frame is carried, whereby another section may be introduced laterally between the said overhanging portion of the frame and V the topmost section of the structure.

2. The combination of an elevated structure composed of sections mounted one on top of the other, a hoisting frame mounted on the structure at the top thereof and having a part extending laterally past the front of the structure, and hoisting devices carriedby said horizontal part, the hoisting frame being movable vertically in a rectilinear path above the top of the structure whereby to provide a space between the hoisting devices and the top of the structure, permitting one or more structure-sections raised by said devices to be moved laterally to a position immediately above the structure and then seated on the top thereof.

3. The combination of an elevated structure, a hoisting frame mounted on the structure at the top thereof and having a part extending laterally past the front of thestructure, and laterally movable hoisting V mechanism mounted on said laterally extending part, the hoisting frame being movable vertically relatively to the top of the structure to provide a space between the hoisting mechanism and the top of the struc- 11 ture whereby one ormore structure-sections hoisted outside of the structure can be moved laterally to a position immediately above the top of the structure and then seated on said to r i. The combination of a hollow tower, a hoisting frame mounted on the tower at the top thereof and over-hanging the tower top, hoisting mechanism carried by said frame and adapted to hoist materials inside the tower and outside the tower, the hoisting frame being vertically movable to provide a space between the top of the tower and the hoisting devices wherebycone or more tower-sections hoisted outside of the 25 tower can be moved laterally to a position over the tower top and then be seated thereon.

5. The combination of an elevated structure, a gallows frame slidably mounted on g the tower;

the structure at the top thereof and having a beam overhanging the structure, means for securing the frame against downward movement, and hoisting devices carried by said beam and laterally movable thereon, for the purpose set forth.

6. The combination of a hollow tower, a gallows frame slidably mounted on the tower at the top thereof and having a beam overhanging the tower, means for securing the frame against downward movement, and a hoisting carriage movable laterally on said beam, for the purpose set forth.

7. The combination of a hollow tower; a hoisting frame at the top of the tower, comprising an upright member slidably engaging the tower, and a cantaliver overhanging means for raising the hoisting frame; and a hoisting carriage movably mounted on the cantaliver; for the purpose set forth.

8. The combination of a hollow tower, rectangular in plan; a hoisting frame at the top of the tower, comprising spaced upright side members slidably engaging adjacent corners of the tower, and a laterally extending member overhanging the tower; means for raising the hoisting frame; and a hoisting device movably mounted on the said laterally extending member; for the purpose set forth.

9. The combination of a hollow sectional tower rectangular in plan and having all its sides parallel to its axis; a gallows frame at the top of the tower, comprising upright side members slidably engaging the rear corners of the tower, and a horizontal member above the tower extending across the tower and beyond the front thereof; a hoisting carriage movable horizontally on said horizontally extending member whereby materials may be hoisted outside of the tower or up through the same; and means to raise said hoisting frame and secure the same in raised position.

In testimony whereof I aflix my signature in the presence of two subscribing witnesses.

FRANCIS DONALDSON.

Witnesses:

LAURA E. SMITH, \V. J. MCKINNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

